<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>02-js书写位置-内部</title>
</head>

<body>
  <script>
    // 内部 js
     alert('你好，js')
  </script>
</body>

</html>